Consolidation - Revenue and Expenses of Consolidated Investment Product (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income:
Total revenues	$ 94,132	$ 80,085	$ 173,908	$ 160,380
Expenses:
Other operating expenses	20,236	12,457	33,462	23,222
Net (Loss) Income Attributable to Common Stockholders	$ (2,389)	$ 8,088	8,554	$ 20,451
CLOs
Income:
Realized and unrealized loss, net			(1,189)
Interest Income			8,445
Total revenues			7,256
Expenses:
Other operating expenses			89
Interest expense			5,852
Total Expense			5,941
Net (Loss) Income Attributable to Common Stockholders			$ 1,315